A Song is a documentary etude on youth, made in the spirit of cinéma vérité. The film employs observational methods to examine popular leisure activities of the Czechoslovak youth in the 1960s, from going outdoors through various sporting activities to musical practices.
| Directing | Jaroslav Šikl | Director |
| Writing | Jaroslav Šikl | Screenplay |
| Sound | Miroslav Bukovský | Sound |
| Editing | Vlasta Styblíková | Editor |
| Production | Josef Tejchman | Production Manager |
| Camera | Jiří Pipka | Director of Photography |